[chef] Re: Re: knife search help when an attr is not defined

awesome, thanks. these examples'll help me grok how to craft more searches.


On Wed, 27 Feb 2013, Jesse Nelson wrote:

> and I suppose if you're trying to get the nodes that have no ec2 data to
> also print you can search for those specifically or put the ec2 conditional
> in puts:
> 
>   knife exec -E 'search( :node, "*:*" ).each { |n| puts " #{n.name}:
> #{n.ec2.ami_id if n.has_key? "ec2" } " } '
> 
> tho that looks pretty ugly :)
> 
> -
> Jesse Nelson
> 
> 
> On Wed, Feb 27, 2013 at 11:30 PM, Jesse Nelson 
> <
 >
>  wrote:
> 
> > your search is completing but your code is trying to access a key that
> > doesn't exist while it runs over the results. node.transform is meant to
> > iterate over a set of nodes and change some attributes. I don't think 
> > thats
> > what you want to be doing here.
> >
> > you can get the list of nodes with ami_id's from  knife search:
> >
> >     knife search node "ec2:ami_id" -a ec2.ami_id
> >
> > if you want ones that dont have this attrib you can try doing
> >
> >      knife search node  "*:*" -a ec2.ami_id
> >
> > You can see that im using knife search's  -a (attribute) to scope the
> > results and the default output formatter will display the fqdn.
> >
> >
> > If you must use knife exec for this you can do it without using transform.
> >
> >      knife exec -E 'search( :node, "*:*" ).each { |n| puts "#{n.name}:
> > #{n.ec2.ami_id}" if n.has_key? "ec2" }'
> >
> > -
> > Jesse Nelson
> >
> >
> >
> > On Wed, Feb 27, 2013 at 11:04 PM, 
> > <
 >
> >  wrote:
> >
> >>
> >> hi. i was trying to list out my nodes and their AMI IDs, but i have a few
> >> nodes that have no ec2 attribute. they're probably nodes that failed 
> >> their
> >> first chef run and need to be cleaned out anyway. when the search runs
> >> into
> >> a node that has no ec2 attr, the search bails out before it completes
> >> listing
> >> everything:
> >>
> >> $ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}:
> >> #{n.ec2.ami_id}" }'
> >> web1.dev.dsnine.com: ami-xxxxxxxx
> >> admin2.stg.dsnine.com: ami-xxxxxxxx
> >> db2.stg.dsnine.com: ami-xxxxxxxx
> >> web4.dev.dsnine.com: ami-xxxxxxxx
> >> app1.stg.dsnine.com: ami-xxxxxxxx
> >> ERROR: ArgumentError: Attribute ec2 is not defined!
> >>
> >>
> >> is there a way to craft the search so the search completes? i tried
> >> checking
> >> if n.ec2.nil?, but that didn't help:
> >>
> >> $ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}:
> >> #{n.ec2.ami_id}" if not n.ec2.nil? }'
> >> web1.dev.dsnine.com: ami-xxxxxxxx
> >> admin2.stg.dsnine.com: ami-xxxxxxxx
> >> db2.stg.dsnine.com: ami-xxxxxxxx
> >> web4.dev.dsnine.com: ami-xxxxxxxx
> >> app1.stg.dsnine.com: ami-xxxxxxxx
> >> ERROR: ArgumentError: Attribute ec2 is not defined!
> >>
> >> $ knife exec -E 'nodes.transform("*:*") {|n| puts "#{n.name}" if
> >> n.ec2.nil? }'
> >> ERROR: ArgumentError: Attribute ec2 is not defined!
> >>
> >> thanks,
> >> kallen
> >>
> >>
> >